Manley Street Flo valves are excellent-quality valves at an affordable price. All are made from stainless steel (intakes are NK-841; exhausts are XH-424) with chrome stems and hardened valve tips. Street Flo series valves are fully machined and swirl polished, and both the materials used and the heat-treating process are superior to those of the Budget replacement series valves. They're available in a variety of head diameters, with either straight stems or undercut "Pro Flo" stems for increased flow. Order the set that's compatible with your vehicle and engine application.

More From This Category

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Length, Gen II, Set of 8

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Length, Gen II, Set of 8

$683.76

MANLEY Valve, Race Master, Exhaust, Bead Loc, 31.5mm Head Dia, 0.2345 in. Stem Dia, 4.274 Length, For Ford 5.0L, Each

MANLEY Valve, Race Master, Exhaust, Bead Loc, 31.5mm Head Dia, 0.2345 in. Stem Dia, 4.274 Length, For Ford 5.0L, Each

$51.07

Sonnax Shuttle Valve Kit, GM, 8L45, 8L90, Each

Sonnax Shuttle Valve Kit, GM, 8L45, 8L90, Each

$59.91

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3415 in. Stem Dia, 4.8 in. Length, For Ford, Each

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3415 in. Stem Dia, 4.8 in. Length, For Ford, Each

$47.58

MANLEY Valve, Race Master, Exhaust, 30mm Head Dia, 0.274 in. Stem Dia, 4.587 Length, For Ford, Each

MANLEY Valve, Race Master, Exhaust, 30mm Head Dia, 0.274 in. Stem Dia, 4.587 Length, For Ford, Each

$51.07